infix operator containing "<-" results in incorrect usage section

[nteetor]

The roxygen documentation below,

#' Custom Assignment
#'
#' My assignment operator.
#'
#' @param x A name.
#' @param value A value to assign.
#'
#' @export
`%<-%` <- function(x, value) {
  value
}

, produces the following .rd file,

\name{\%<-\%}
\alias{\%<-\%}
\title{Custom Assignment}
\usage{
\%\%(x) <- value
}
\arguments{
\item{x}{A name.}

\item{value}{A value to assign.}
}
\description{
My assignment operator.
}

The usage section should read,

\usage{
x %<-% value
}